Find the length of side x in simplest radical form with a rational denominator.
Have you TRIED to answer this Q? It is very similar to your other three or four postings.....what have YOU tried ?
Here is a start....it is just like the previous one
remember ( these things you have to memorize) sin 45 = sqrt (2) / 2
and do you remember S-O-H-C-A-H-T-O-A ????
sin = opposite / hypotenuse
soooo sin 45 = sqrt(2)/2 = opp/hyp = x / (sqrt (2) for this diagram
sqrt (2) / 2 = x / sqrt(2) now solve for 'x'